[KongchangAI]
Unverified85% confidenceSolutionTime unknown

户外安全饮水的标准方案:粗滤(预过滤棉/沉淀)→重力式微滤(细菌/原虫)→按病毒风险叠加化学片剂或紫外笔,重力式净水器承担的是省力的主力过滤环节,不是唯一防线

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85%
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Long-term
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